From -196°C to -80°C: redefining standards in sperm biobanking technology

Area of Science:

• Reproductive Medicine
• Biobanking
• Genetic Conservation

Background:

• Sperm cryopreservation is vital for reproductive medicine, biodiversity, and research.
• Liquid nitrogen (LN2) storage at -196°C is the traditional standard but presents challenges.
• High costs, logistics, and safety concerns necessitate exploring alternatives to LN2.

Purpose of the Study:

• To review the historical development of sperm cryopreservation.
• To propose a shift towards ultra-low freezers (-80°C) for sperm biobanking.
• To evaluate the feasibility and benefits of -80°C storage.

Main Methods:

• Historical review of sperm cryopreservation techniques.
• Analysis of emerging evidence on ultra-low freezer efficacy.
• Comparative assessment of sperm viability at -80°C versus -196°C.

Main Results:

• Ultra-low freezers (-80°C) present a cost-effective, sustainable, and accessible sperm biobanking solution.
• Spermatozoa stored at -80°C demonstrate retained fertilization potential over extended durations.
• Cryoprotectants and antioxidants can potentially enhance sperm viability and mitigate DNA damage at -80°C.

Conclusions:

• A paradigm shift towards -80°C ultra-low freezers is proposed for sperm biobanking.
• This approach decentralizes storage, reduces LN2 dependence, and enhances inclusivity.
• -80°C storage offers a resilient and environmentally sustainable method for preserving genetic resources.